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Employer Contributions (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
IAM National Pension Fund |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN |  | 516031295 |  |
Pension Plan No. |  | 002 |  |
Pension Protection Act Zone Status |  | Green |  |
FIP/RP Status Pending/ Implemented |  | No |  |
Contributions |  | $ 139 | $ 121 | $ 113
Surcharge Imposed |  | No |  |
Expiration Date of Collective Bargaining Agreement |  | Apr. 30, 2021 |  |
Retail Wholesale And Department Store International Union And Industry Pension Fund |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN |  | 630708442 |  |
Pension Plan No. |  | 001 |  |
Pension Protection Act Zone Status |  | Red |  |
FIP/RP Status Pending/ Implemented |  | Implemented |  |
Contributions |  | $ 157 | 156 | 130
Surcharge Imposed |  | No |  |
Expiration Date of Collective Bargaining Agreement |  | Aug. 14, 2021 |  |
Western Conference Of Teamsters Pension Trust |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN | [1] | 916145047 |  |
Pension Plan No. | [1] | 001 |  |
Pension Protection Act Zone Status | [1] | Green |  |
FIP/RP Status Pending/ Implemented | [1] | No |  |
Contributions | [1] | $ 276 | 233 | 271
Surcharge Imposed | [1] | No |  |
Expiration Date of Collective Bargaining Agreement | [1] | Feb. 04, 2017 |  |
BC&T International Pension Fund |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
EIN | [1] | 526118572 |  |
Pension Plan No. | [1] | 001 |  |
FIP/RP Status Pending/ Implemented | [1] | Implemented |  |
Contributions | [1] | $ 965 | $ 1,194 | $ 1,121
Surcharge Imposed | [1] | Yes |  |
Expiration Date of Collective Bargaining Agreement | [1] | Oct. 31, 2015 |  |
[1] | The union employees withdrew from the fund effective November 1, 2017. The collective bargaining agreement is still in effect.

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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation 12B -Number 240 -Section 12b -Subsection 1 + Details
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- Definition Amount of contributions made to multiemployer plan by employer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947 + Details
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- Definition Three digit plan number for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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- Definition Indicate whether a funding improvement plan or rehabilitation plan has been implemented or is pending for a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. The acceptable values are "no", "pending", "implemented", "other", and "NA". + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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